Short-term Borrowings (Schedule of Weighted Average Daily Amounts of Borrowings Outstanding) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Short-term Debt [Abstract]
Average Daily Amounts Outstanding	$ 19,665	$ 36,445	$ 13,843	$ 28,901
Weighted Average Interest Rates	1.18%	1.65%	1.16%	1.96%